The main aim of signing Ronaldo for Juventus was clearly to win the Champions league, which they didn’t achieve. I see this as the main reason why people claim Ronaldo wasn’t a good signing for Juventus. As well as him being one of the main reasons for Juventus’ economic issues.
Have you looked at the average age of the juventus team that reached the final a couple of years before he arrived, there were like two players under the age of 30 in the whole team, by the time Ronaldo arrived two years on, they obviously weren’t as strong